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United States Patent | 5,073,011 |
Ito ,   et al. | December 17, 1991 |
An electrochromic device is disclosed. The electrochromic device includes a pair of bases, and both a primary and a reference electrochromic element provided between the bases. The reference electrode is electrically connected to the primary electrochromic element so as to maintain the color-developing and fading potentials of the primary electrochromic element at predetermined voltages. A power regulator is also provided for driving the primary electrochromic element based in part on the output of the reference electrochromic element.
Inventors: | Ito; Toshiyasu (Kasugai, JP); Mori; Takaaki (Inazawa, JP); Kato; Mamoru (Nagoya, JP); Uemura; Toshiya (Nagoya, JP) |
Assignee: | Toyoda Gosei Co., Ltd. (Nishikasugai, JP) |
Appl. No.: | 605359 |
Filed: | October 30, 1990 |
Oct 31, 1989[JP] | 1-127326[U] |
Current U.S. Class: | 359/265 |
Intern'l Class: | G02F 001/01 |
Field of Search: | 350/357,353 |
4479121 | Oct., 1984 | Tabata | 350/357. |
4664934 | May., 1987 | Ito et al. | 427/38. |
4750816 | Jun., 1988 | Ito et al. | 350/357. |
4787716 | Nov., 1988 | Kato et al. | 350/357. |
4832468 | May., 1989 | Ito et al. | 350/357. |
4872745 | Oct., 1989 | Fujisawa et al. | 350/357. |
4874229 | Oct., 1989 | Ito et al. | 350/357. |
4927246 | May., 1990 | Ito et al. | 350/357. |
4933050 | Jun., 1990 | Ito et al. | 204/15. |
Foreign Patent Documents | |||
54-5458 | Jan., 1979 | JP | 350/357. |